Automatic blocking mechanism for strip-mills.



A. SUNDH.

AUTOMATIC BLOCKING MECHANISM FOR STRIP MILLS.

APPLICATION FILED FEB- 7. I916- Patented Mar. 12, 1918.

I SHEETS-SHEET I.

Z] nuewIo z A. SUNDH.

AUTOMATIC BLOCKING MECHANISM FOR srmP MILLS.

APPLICATION FILED FEB. 7, I916- Patented Mar. 12, 1918.

7 SHEETS-SHEET 2.

,rrlIIIIfIIIlI .l lv

A. SUNDH.

AUTOMATIC BLOCKING MECHANISM FOR STRIP MILLS.

APPLICATKON FILED FEB. 7, 1916- 1,259, 162. Patented Mar. 12, 1918.

I SHEETS-SHEET 3- 5] nvemtoz A. SUNDH.

AUTOMATIC BLOCKING MECHANISM FOR STRIP MILLS.

APPLICATION FILED FEB-7,1916.

Patented Mar. 12, 191&

7 SHEETS-SHEET 4.

5 nawfoz A. SUNDH.

AUTOMATIC BLOCKING MECHANISM FOR STRIP MILLS.

APPLICATION FILED FEB. 7, 1916.

Patented Mar. 12, 191&v

7 SHEETS-SHEET 5.

A. SUNDH.

- AUTOMATIC BLOCKING MECHANISM FOR STRIP MILLS.

APPLICATION FILED FEB. 7, 1916.

1 ,259, 1 62. w Patented Mar. 12, 1918.

7 SHEETS-SHEET 6.

SUNDH.

ME H

A. AUTOMATIC BLOCKING ISMFOR STRIP MILLS.

' APPLICATION Fl FEB. 7. 1916.

Patented I 354.3 @H'ozmeag AUGUST SUEDE, 0]? HASTINGS-UI'ON-HUDSON, NEW YORK.

AUTOMATIC BLOCKING MECHANISM FOR STRIP-MILLS.

Specification of Letters Patent.

Patented Mar. as, rare.

Application filed February 7, 1916. Serial No. 76,628.-

To all whom it mm concern: Be it known t at I, AUGUST SUNnH, a

citizen of the United States, residing in provement in strip blocking mechanism, is

designed to add to the art of strip blocking, a machine which will be practically automatic throughout its entire operation; at

least to that extent that the strip will not have to be handled by hand from the time it enters the rolling mill until it is blocked and ready-to be taken'ofi' the machine. The advantages of such a machine are many, one of the most important bein that the danger of the operator being lnjured is eliminated, and the machine may, due to its automatic operation, be run at a very much higher speed than the machines now in use. I Among the features of novelty of this machine, all of which will be described fully in detail hereinafter, as Well as other features which I will gointo later on, may be mentioned the following: The provision of hydraulic means between the prime mover and the block, which hydraulic means automatically operates to maintain a practically constant tension on the strip being blocked, thus taking care of the increasing diameter of the strip and block when the machine is in operation; a block having mechanism within it which is set in motion before the strip enters the block; means to connect the normallylstationary block to the inner rotating mechanism; means to give warning to the operator when this mechanism should be operated; manually operative means simultaneously to effect the expansion ofthe inner mechanism of the block, the withdrawal of the guiding means for the strip from the block, and the release of the block, so the same may'be free to rotate; means to take care 0 possible buckling of the strip in the guide, this means permitting the strip to escape. In the latter connection, I mav say that the escape of the strip in case of buckling is important. as when the strip starts to buckle it buckles close up to the mill rolls and the mill attempts to force the buckled strip through the guides to the block. As a consequence the guiding mechanism will be destroyed from the enormous pressure exerted on it by the mill rolls through the buckled strip". After the strip has once buckled the only thing to do is to cut it. ofl back of the rolling mill and with my I arrangement, this may be done of-course, as in any machine, but I have the advantage that the buckled strip which has already passed the rolling mill will not injure the guiding mechanism. The block which I have shown in this application is somewhat similar to that shown in my co-pending application, Ser. No. 55,361, filed October 11,

1915, the present block being an improvement, however, in that when the strip is being Wound the slot throu 'h which the 'strip enters the block is closed up to the thickness of the strip being wound, thus affording a practically smooth circular surface for the strip to be wound on. Were this slot not closed up, the strip in being woundis likely to be forced down into the opening to mark the strip.

Referring to the drawings, Fi re 1 is a plan view of the assembled machine; Fig.2 IS anelevation partly in section, looking from left to right of. Fig. 1; Fig. 3 is an elevation partly in section ,on the line (1-0; of Fig. 1, looking from left to right; Fig. 4 is a section through the driving mechanism for the block, showing the fluid motor, its connection to the electric motor and the brake or clutch mechanism for stopping the machine; 5 is an. end view partly in section of the fluid motor; Fi 6 shows in elevation the'mean's for contro ing the fluid motor of Fig. 5; Fig. 7 is an end view in section of the block, showing a strip in place and the inner mechanism of the block expanded to grip it; Fig. 8 is an end View of the block showing the block after the strip has been attached thereto and the block has madeone revolution; Fig. 9 is an end View partly in section'showing the inner. mechanism of the block collapsed ready for the removal of the strip; Fig. .10 is a longitudinal section through the whole length or the block; Fig. 11 is a view showing the details of the means for withdrawing the guiding means for the strip; Fig. 12 is'a modification of the apparatus shown in Fig. 3 for imparting an impulse to the hand of the operator in the initial operation of the machine; Fig. 13 shows in detail the means for automatically regulating the pressure within thefiuid transmission mechanism;

- on a hollow shaft 7. G. and G are guiding members provided on the right and left hand ends, respectively, of the block. From Fig. 10 it will be seen that movement of the sleeve 6 to the right will collapse the member 3, the sections thereof being retained against longitudinal movement by the members- G and G, to leave an open space between the periphery of the member 3 and the inside of the member 4 of the block. (See Fig. 9). Thus it will be seen that if a strip be fed into this space between the two members 3 and 4, and the member 3 be expanded by moving the sleeve 6 back toward the position shown in Fig. 10, no matter how thin the strip, the strip will be gripped. The block 4 is made in four sections fastened together by hinge members 8. Between two sections of the inner mechanism of the block and two sections of the block, are springs 10, these springs being provided for the purpose of forcing two of the block sections away from the corresponding sections of the inner mechanism of the block until after the strip has entered between the two parts. TVhen the strip is being wound, it will'be seen (Fig. 8)' that .the outer sections are forced down against the action of the springs 10, by the strip, so that the contour of the outside of the block will be maintained practically circular, and present a smooth unbroken surface for the reception of the strip being blocked. This is important as already'pointed out. Within the shaft 7, and supported thereby on pins 11 and 12 is a link 13, the pins 11 and 12 passing through slots 14 running ]ongitudinally of the shaft. The pin 12 passes through opposite sides of the shaft and is connected directlv to the sleeve 6. (See Fig. 7). Thus it will be seen that any longi tudinal movement of the link 13, will, by reason of the slot and pin connection, 14 and 12. cause the sleeve6 to be moved longitudinally also, which will have the effect of collapsing or expanding the inner mechanism of the block. depending of course on whether the link 13 is moved to the right or left. T he pin 11 extends to the outside of the block and enters a member 14' carried thereby. and which member turns with the block, the periphery of this member being gro ved to receive a ring 15, which remains stationary when the member 14': is rotating.

. The ring 15 carries two bosses 16 diametrically opposite each other. These bosses are engaged by the forked ends of a yoke 16,

forming'one end of a bell crank lever 17. The lever 17 is pivoted to the frame of the machine at 19. Pivoted to the lever 17 at 21 is a rod, 20, extending over to a controlling hand lever 22. The hand lever 22 is pivoted to the frame of the machine at 23. From Figs. 1 and 3 it will be seen, that, a. movement of the hand lever 22 to the left or right will move themember 14 to the right or left and as this member is connected by the pin 11 to the link 13, such movement will either collapse'or expand the inner mechanism of the block. A rod 24 carried on the controlling lever 22 is normally pressed downwardly by means of a small spring to engage a quadrant 25 to hold the controlling lever in any desired position, in the usual way. The lever 22 carries two members, 26 and 27, Fig. 3, the member 26 being adapted when pressed by the hand of the operator to actuate the rod 24: to withdraw it from v engagement with the quadrant 25, thus permitting the lever 22 to be moved. The lower end of the member 26 carries a contact'28, which is attracted to a magnet 29 when the latter is energized by closing of a circuit.

deriving its power from batteries B, by the feeding forward ofthe strip from the rolling mill. The attracting of the contact 28 to the magnet 29- will give a slight movement to the member 26, to give notice to the operator of the machine that the strip has reached a certain position and the lever 22 should be moved. To aid the operator in moving the lever 22, I have provided an into operative position by depression of a foot lever L which is connected by means of a chain C to theguides, the other end of the chain carrying a weight vV provided to withdraw the guides from the block. Referrin to Figs. 1,2, 3 and 11, it will be seen (Fig. 2) that the guides comprise an upper member 31, and a lower member 32, the end of each extending slightly into the opening in the block so as to insure that the stripwill enter the block. The latter carries a rack, 33, which is in engagement with the teeth of a gear, 31, carried on" the same shaft, 35, as the sprocket wheel 36, over which passes the chain C already mentioned carrying the weight, W. Thus the raising or lowering of the weight W will cause the rack 33'and consequently the guide resales her, 32, while the, other end is in contact with the lower roll of the rolling mill, this end being beveled to a knife edge, and pro vided for the purpose of scrapin the strip from the roll as it comes throng the mill. A spring, 39, bearing against an arm 40, carried by the member, 38, is provided in order to insure that the end of the member 38 will always be in firm engagement with the face of the roll, that the strips may always be scraped from the roll. The upper member, 31 of the guide is supported on the shaft 35, by means of a member 41, keyed thereto, and eccentric to the sprocket 36, but concentric with a member 42 within which the member 41 is adapted to-rotate. The member 42 carries an arm 43 which is pivoted to the member 31. A movement downward of the weight W from the position shown in Fig. 2 will rotate the shaft 35 in a clockwise direction, carrying with it the member 41, this member being concentric to the sprocket 36, but eccentric to the member 42 will push the latter upwardly carrying with it the guide 31. lhe end of the guide toward the rolling mill is beveled to a knife edge where it engages the roll of the mill, the purpose of which is to scrape the strip from the roll. Secured to the guide, 31, is an arm 44, extending part way around the upper roll of the rolling mill, the end of this arm carrying a small spring, this spring tending to turn the arm about a fulcrum formed by a raised portion 45 on the under side of the arm, and which raised portion contacts with the roll of the mill; the knife edge of the guide will therefore always be held in firm engagement with the mill roll. When the upper guide member is raised, the arm 44 will merely be turned around the roll a distance corresponding with the distance the guide moves, but the end of the guide in contact with the roll will remain in contact with it.

A trap door 46 is provided in the upper guide member, in order, that, if for any reason the strip should buckle passing through from the rolling mill, instead of being forced through the guide toward the blocking mechanism, it may escape out through this trap door, until it is either cut off back of the rolling mill, or the mill stopped; a guiding member A attached to the arm 44, forms a guide for the strip as it comes through the trap door 46. A roller, R is placed in the guide, but insulated therefrom, and being in position to be struck and raised by the advancing strips as they come from the rolling'mill, to close a circuit for the magnet 29, to impart an impulse to the hand of the operator, by giving a slight movement to the member 26 on the controlling lever 22 as before pointed out. The current for this circuit is derived from batteries B, here shown as being carried in the housing which forms a support for the sprocket wheel36. A boss 50 is provided on in raised position, as shown in Fig. 3,.and the lever 51 y its engagement with the boss 50 will hold it raised. When the bell crank 17 is moved to expand the inner mechanism of the block, it at the same time depresses the lever 51 to lift it out of engagement with the boss 50, to permit the weight to drop to withdraw the guides from the block. The circuit from the batteries B is grounded on the frame of the machine, and as the lower guide member is in contact with the frame of the machine, the circuit from the batteries will be closed through the strip when the strip engages the roller R.

The in 19 on which the bell crank 17 is pivote carries also a bell crank lever 47, which is for the purpose of holding the block in proper position until the strip has entered, This lever enters a notch in the member 48 rotating with the-outside of the block. The lower end of the lever 47 carries a bolt49 which engages an extension formed on the bell crank lever 17. Movement of the controlling lever in a direction to expand the inner mechanism ofthe block will also cause the member 47 to be withdrawn from engagement with the member 48, to permit the member 48 and the block to rotate.

Thus far I have described only the block proper and mechanism for expanding or collapsing the inner mechanism of the block, etc.

I will now describe the driving mechanism for the block. My prime mover is shown as an alternating current reversible motor M, carrying a gear, 1, on its drive shaft, this gear meshing with a large hollow gear 2, within which is carried a gear 52", adapted to rotate on a member 53'. The gear 52 When meshes with a gear 54, keyed to the shaft 7 which drives the inside of the block. The gear 2 is filled with oil or any. other suitable fluid, and together with the gears 52 and 54 forms fluid means for driving the inside of the block. Keyed to the right hand end of the shaft, 7 .'as viewed in Fig. 4, is a clutch or brake member 55, adapted to be moved into and out of engagement with the bearing 56 for the shaft 7. This member, 56, contains a winding, 57, energized by current from a source, 58, which is controlled by a. switch 59. Energization of this winding by means of the switch, will cause the Winding to attract the clutch member 55 .and pull it to the right (Fig. 4) to engage the fixed bearing member 56. Valve mechanism V is provided for the fluid transmission mechanism -within the gear 2, which has been def scribed. This valve mechanism is controlled manually by means of a lever, 60, connected by levers X and'Y to a member 61 mounted on a member 62 adapted to slide on the shaft 7 but not to rotate therewith. Movement of the lever 60 will therefore cause the memincreasing diameter of the block as the strip is being wound, to prevent this increased diameter increasing the tension on the strip being blocked, the valve mechanism V being operated by hand as already described. On machines now'in use it is customary to provide a belt which'is adjustable, that is the tension of which is adjustable, and an attendant has to watch it to keep thetension adjusted properly,'so as not to get an increase in tension on the strip. As the strip is traveling at high speed, the attendant has to work more or less by guess work, which is not at all satisfactory, as frequently the strip is torn, due to the tension becoming too great.- My device comprises a hollow casing, 63, which is connected to the fluid transmission mechanism and rotates with the gear 2. .64 and 65 are the supply and exhaust pipes, respectively, leading to "the supply and exhaust sides of the fluid transmission mechanism within the casing 2.

Mounted within the casin is a valve stem, 66, carrying-pistons. 67 an 68, the piston 68 controlling the exhaust ipe 65. 69' is a pipe connecting the cham ers formed by the pistons 67 and 68, to the left and right of these pistons, respectively. With this ar-" rangement the pistons 67 and 68 will be balanced by the fluid pressure from the fluid transmission mechanism. Provided within the casing 63 near its left hand end is a web.

which forms another chamber 71 within the casing." A pipe 72 leads from the supply side of the fluid transmission mechanism, to this chamber, 71. The valve stem 66 extends the length of the valve casing, abutting against the left hand end within the chamber 71. This stem carries on its other end a spring 73', which is adjustable, this spring being for the purpose of balancing the pressure normally within the chamber71. Now as the diameter of the block increases, the pressure within the fluid transmission mechanism rises, and as this pressure has access to the mechanism just described, it will act onthe end of the valve stem 66 within the chamber 71 and force the stem to the right against the action of the spring 73', uncovering the port leading to the exhaust pipe 65 and the fluid will be free to escape to the exhaust side of the fluid transmission, mechanism. The release of this fluid will of course reduce the pressure in the fluid transmission mechanism to that oint where the tension on the strip is what it was at the start,,

Fig. 12 illustrates a modification of the apparatus for imparting an impulse to the hand of the operator. A bell crank lever 67 is pivoted to the guide and carries on one end the roller. R, its other end being connected to a rod 68, which is attached to the member 27 on the controlling lever. As the strip passes under the roller it actuates the member 27 through the mechanism just described, to warn the operator that the strip has reached that point in its travel. As the operator compresses the members 26 and 27, by reason of the lever connection between the' member 26 and valve mechanism 69, the valve 'will be moved into position to open a passage from an inlet pipe 70 to a npe 71 behind the piston 72 in a chamber 3 to move the piston to the right; this movement, by reason of the connecting rod 74 attached to the lever 22 will aid the operator in moving the same.

Acycle of operation of the whole apparatus will .now be described: The hand wheel H is first moved to bring the opening in the block abreast of the end of the guides, which are brought into position by depressing the foot lever L. With the switch S closed, controlling the supply of current to the motor M, the switch 59 is moved to the right, viewed in Fig. 4, which starts the motor. Actuation of this switch, 59, breaks the circuit to the winding 57 of the clutch or brake mechanism,'55, and the same is released from frictional engagement with the part 56, this release being assisted by a spring, as I have shown, if desired. Up to this time the block is stationary, the fluid transmission mechanism merely running idle. The lever 60 is now moved to lock the fluid within the gear 2, to cause the fluid transmission mechanism to drive the shaft 7, and the inner mechanism of the block starts to rotate. The strip traveling through the guides reaches the roller R and closes a circuit to the magnet 29, which notifies the operator, by actuating the member 26, that the strip has'advanced that far along the guides. The operator'now throws his controlling lever 22 in a direction to expand the inner mechanism of the block, the roller being so placed in the guides that by the time the operator receives an impulse and throws his lever 22 the strip will have reached the. inside of the block. The strip is now clamped. The operator is assisted in throwing his lever 22 by the magnet 30, which magnet is energized so soon amazes on. As the strip makes its first turn.

around the block, it compresses the springs 10 to de ress the sections of the outer part of the lock into the position shown in Fig. 8, and closes up the slot through which the strip enters the block, so as to resent a smooth, circular, continuous sur ace to the strip. As the diameter of the block increases, due to the strip being wound on it, the pressure in the fluid transmission mechanism rises slightly sufliciently to actuate the mechanism already described, and shown in Fig. 13, which automatically relieves the pressure until it is reduced to the proper amount, to give the proper tension on the strip; in other words maintains the tension on the strip practically constant. When the strip has beenblocked, the lever 60 is first thrown to central position, so that the fluid transmission mechanism by-passes its fluid, to allow the gear 2 to rotate Without impartin motion through the said 7, and to the block. The block will then gradually come to rest. If desired the block may be brought to rest more quickly, by moving the lever 59 back to central position, thus closing the circuit to the winding 57 in the bearing member 56, which will attract .the clutch or brake 55 to it, to bring the two into strong frictional engagement and as the member 55 is keyed on the shaft 7, and as the member 56 is stationary, the block will be stopped almost instantly. The lever 22 is now brought to central position, which collapses the inner mechanism of the block, and permits the hinged sections of the outside portions or shell of the block to fall inwardly, to permit the strip to be removed. 5

I do not desire to be limited to the precise details and arrangements of parts herein shown and described, as others skilled in the art might make various changes therein without departing from the spirit and scope of the invention.

What I claim as new, and desire to secure by Letters Patent of the United States is 1. In a blocking device for a strip mill, the combination of a rotatable block, means to drive the block, fluid mechanism intermediate said means and said block for trans- G5 mitting the energy of the block driving fluid transmi sion mechanism to the shaft the combination of a rotatable block, means to drive the block, fluid mechanism intermediate the means and said block and actuated by said means to transmit the energy of the block driving means to the block, and means automatically operative by the pressure in said fluid mechanism due to the tension on the strip to maintain the tension on the strip practically constantthroughout the blocking operation.

3. In a blocking device for a strip mill, the combination of a rotatable "block, a motor to drive the block, fluid mechanism intermediate the motor and said block and actuated by the motor, and means rotating with the block and operating automatically to maintain the pressure in the fluid mechanism to such a degree that thetension on the strip will be practically constant throughout the blocking operation. a

4. In a rotatable block ada ted to wind at strip fed from the strip mil, the combination of inner expandible mechanism, an expandible yieldable casing for said mechanism, a longitudinal opening for the strip in said casing, for the strip to enter, said yieldable casing being adapted to yield to the pressure of the strip when wound on it to form a smooth surface, and close u the longitudinal opening to the size ot the thickness of the strip.

5. In a rotatable block adapted to wind a strip fed from a strip) mill, the combination of an inner rotata 1e member, and an outer rotatable member, the outer rotatable member comprising sections hinged together to form a cylindrlcal sectional shell, a longitudinal opening in said shell, means to expand said longitudinal opening to a predetermined size, said means being adapted to be compressed by the pressure of the strip, to close the opening to the size of the thickness of the 'strip when the strip is being wound on the block.

6. In a blocking device for a strip mill, the combination of a rotatable block adapted to wind a strip fed from the strip mill, comprising an internal rotatable expandible mechanism and an external rotatable mechanism, means to hold the external rotatable mechanism at rest, external controlling means for said block, intermediate mechanism connecting said controlling means and the internal rotatable mechanism of the block, and means to simultaneously release the external rotatable mechanism and expand the internal rotatable expandible mechanism.

'7. In a blocking device for a strip mill,

the combination of a rotatable block, adapted to ,wind a strip fed from a strip mill, guiding means between the mill and the block, said guiding means comprising one upper and one lower guide member, and means to Withdraw sai guiding members simultaneously when the strip enters the block, the upper guide member being raised in a vertical direction and .guided at one end by the upper roll of the mill.

8. In a blockin device for a strip mill, the combination o a rotatable block adapted to wind a strip fed from a strip mill, upper and lower guide members or guiding the strip from the mill rolls to the block,

'- said guide members having knife edges in contact with the mill rolls, one guide member having an extension surrounding part of the top roll of the mill, and a spring device cooperating with said extension to hold the knife edge of the upper guide member in contact with the mill roll at all times.

9. In a blocking device for a strip mill,

the combinationof a rotatable block adapt ed to wind a strip fed from a strip m-ill, guiding means for guiding the strip from the mill roll to the b ock, a trap door hinged in the uiding means and forming part of the gui ing means, said trap door adapted to be pushed open b the feedin movement of the strip coming rom the mil rolls when said stri buckles or gets stuck before entering t e block, or before the guiding means are withdrawn from the block.

10. In a blocking device for a strip mill, the combination of a rotatable block adapted to wind a strip fed from a strip mill, means to guide the strip from the mill rolls to the block, a trap door for the escape of a buckling strip and adapted to be operated by the feeding movement of the strip before reaching the block, and means to guide the strip from the mill rolls when escaping through the trap door. 45

11. In a blocking device for a strip mill, the combination of a rotatable block adapted to Wind a strip fed from a strip mill, a manually operated lever, and means operated by the movement of the strip fed from the strip mill to impart an impulse to the operator at the instant the said lever should be operated to secure the strip to the block.

12. In a blocking device for a strip mill, the combination of a rotatable block adapted to wind a strip fed from a strip mill, mechanism in said block to clamp the strip to the block, manually operative means for controlling said mechanism, and electromagnetic means controlled by the feeding movement of the strip for imparting an impulse to an operator at the instant the manually operative means should be operated to clamp the strip to the block.

13. In a blocking device for a strip mill, the combination of a rotatable block adapted the combination of a rotatable block comprising mechanism for securing the strip to g the block, means adapted to be operated by hand for controlling said block strip securing means, and means controlled by the feeding movement of the strip and connected with the hand operating means to impart an impulse to the operators hand at the instant the hand operated controlling means should be operated.

15. In a blocking device for a strip mill, the combination of a rotatable block comprising mechanism for securing the strip to the block, means adapted to be operated by hand for controlling said block strip securing mechanism, a circuit closed by the strip when it reaches a predetermined point in its travel through the guides, electromagnetic means actuated by the closing of said circuit to impart an impulse to the operators hand at the instant the hand operated con trolling means should be operated.

16. In a blocking device for a strip mill, the combination of a rotatable block, adapted to wind a strip fed from a strip mill, said block comprising an internalrotatable mechanism and external rotatable mechanism, means to hold said external mechanism at rest, manually operated means for controlling the internal block mechanism and for releasing the external rotatable mechanism to clamp the strip to the block, and means controlled by the feeding movement of the strip for imparting an impulse to the hand of the operator at the instant the said manually operative means should be operated to at the same time clamp the strip to the block and release the external mechanism.

17. In a blocking device for a strip mill, the combination of a rotatable block adapted to Wind a strip fed from a strip mill, said block comprising an internal rotatable mechanism and an external rotatable mechanism, means to hold said externalimechanism at rest, common manually operated means for controlling the internal block mechanism, for releasing the' external rotatable mechamsm and to clamp the strip to the block, guiding means for the strip controlled by said manually operated means, and means controlled by the feeding movement of the strip for imparting animpulse to the hand of the operator at the instant the mannall lease the external mechanism and withdraw of the strip for imparting an impulse to the guiding means. the hand of the operator at the instant the 18. In a blocking device for a strip mill, manual means should be operated to cause the combination of a rotatable block adapted the means controlled thereby to function. 1 15 5 to wind at strip fed from a strip mill, said In testimony whereof, I have signed my block comprising means for securing the name to this specification in the presence of strip to the block when same has entered the two subscribing witnesses.

block, manual means and means controlled AUGUST SUNDH. thereby and cooperating therewith for con- Witnesses: 0 trolling said strip securing means, and L. H. CAMPBELL,

means controlled by the feeding movement 7 DAVID C. PEARSON. 

